All prior certifications from V7, 8, 8i etc can be upgraded to 12c with a single exame 1Z0-060.
I believe that this is a break from previous certification upgrades. My understanding is that, normally, only 10g and above could upgrade directly to 12c.
(for example, I upgraded from 9i to 11g with one exam but the 10g to 11g upgrade was a different exam)
OR has this always been the policy --- all previous versions can be upgraded to the current version with a single exam ?
Hemant K Chitael
This is the first exam that has allowed an upgrade from any prior release. It is also the first upgrade exam to have a 'DBA Basics' section in addition to the 'New Features' section. I don't know if the two are related (i.e. if the '1Z0-070' exam will upgrade just from 12c and there will be a '1Z0-075' to upgrade from earlier releases and neither will have the 'DBA Basics' section).
My guess is that the upgrade path from very old releases was simply getting complicated. People in very old releases were going to have to take multiple exams to upgrade their OCP certification to the current release. This exam allows a milestone where anyone at an older release can jump to 12c. If I were to attempt to predict the future, I'd say that when OU is in need of another upgrade exam, there will only be a 1Z0-070 exam that upgrades from 12c. The upgrade path for anyone in older releases will be to take 1Z0-060 and then 1Z0-070. They'll probably return to the 1 or 2 release upgrade logic (1Z0-0x0 and 1Z0-0x5) until there is another big gap (say around Oracle 17z) when they'll make another milestone exam.
Mind you -- predicting the future is an interesting pastime, but seldom accurate.